How can version 6 be updated to 7?

How can version 5 be updated to 6?

1. If after the update you see “Uncaught exception ‘ADODB_Exception’ with message…” errors in logs or after the group has been saved:
— go to “Update > Migrations” page and relaunch migrations one by one starting from 10 up to 20. Do not mind the errors during relaunch. They only mean the successful launch of migrations earlier.

2.If the layout of the admin panel is broken:
— move the custom redirects (if added before) from application/data/redirects/ to application/redirects. After that delete or rename application/data/redirects.